<%@page contentType="text/html; charset=utf-8" language="java" %>
<html>
<head>
    <meta charset="utf-8" />
</head>
<body>
<h2><%= "Hello World!" %></h2>

<script>
    // javascript  ES
    alert("哈哈哈")
    var num1= 12
    alert(num1)
    var  array1 = new Array(12,46,67,89,10,true)
  
    document.write(array1)
</script>
</body>
</html>
